In a previous post, I discussed the development of an efficiency factor for regular sized sleeping pads that takes into account warmth and weight. The warmth is given by the R-value, a standard measure used in the construction industry for insulation. I standardized the weight with the surface area, but I only included a chart […]

Sleeping pad manufacturers have been quoting R-values for their pads lately. This is a major step up from quoting nothing for a warmth spec. However, until there is a similar system for rating sleeping bags, and then a system for comparing sleep systems, there will still be a lot of trial and error in choosing […]